西南农业学报2025，Vol.38Issue(8)：1595-1605,11.DOI:10.16213/j.cnki.scjas.2025.8.004
辐照聚合农林保水剂与肥料配施对不同质地土壤保水保肥能力的影响
Effects of combined application of irradiation-polymerized water-retaining agent and fertilizers on water and nutrient retention capacities in soils with different textures
摘要
Abstract
[Objective]The study aimed to investigate the effects of combined application of irradiation-polymerized agroforestry water-retai-ning agent(WRA)and fertilizers on water and nutrient retention capacities in soils with different textures,aiming to determine the optimal application ratio.[Method]A laboratory soil column leaching experiment was conducted using three soil textures(sandy soil,loam soil and clay soil)with six WRA application rates(0,0.05％,0.10％,0.25％,0.50％and 0.75％of soil dry weight).The volume of leachate and the leaching losses of nitrogen(N),phosphorus(P),and potassium(K)were measured after five leaching events.[Result]The irradiation-polymerized WRA significantly reduced leachate volume and enhanced soil water retention capacity.Compared with the control(CK2),the SF4 treatment(0.25％WRA)in sandy soil showed the highest reduction in leachate volume(21.4％),followed by SF5(0.50％WRA)in loam(13.2％)and clay(7.8％)soils.The inhibitory effect on water leaching followed the order:sandy soil＞loam soil＞clay soil.The WRA also reduced nutrient leaching losses and improved soil nutrient retention.In sandy soil,SF4 decreased total N,ammonium-N,nitrate-N,and total K leaching losses by 27.5％,30.3％,40.9％and 31.2％,respectively,with fertilizer use efficiency(FUE)increasing by 27.2％-31.2％.In loam soil,SF3(0.10％WRA)reduced total N,ammonium-N,nitrate-N,total P,and total K leaching losses by 17.5％,12.3％,42.5％,9.1％and 21.4％,respectively,with FUE improving by 8.9％-21.4％.In clay soil,SF2(0.05％WRA)de-creased total N,ammonium-N,nitrate-N,total P,and total K leaching losses by 2.2％,8.0％,37.4％,9.8％and 1.3％,respectively,with FUE increasing by 2.6％-11.4％.The inhibitory effect on nutrient leaching followed the order:sandy soil＞loam soil＞clay soil.[Conclu-sion]The irradiation-polymerized WRA enhances soil water and nutrient retention through a synergistic mechanism of'physical interception-chemical adsorption'.In sandy and loam soils,the WRA primarily controlls nitrate-N and K leaching,while in clay soil,it mainly regulates ammonium-N and P retention.The recommended WRA application rates are 0.25％-0.50％for sandy soil,0.10％-0.25％for loam soil,and 0.05％-0.10％for clay soil,which can effectively improve soil water and nutrient retention,providing technical support for enhancing fertilizer use efficiency and mitigating agricultural non-point source pollution.关键词
辐照聚合农林保水剂/土壤质地/养分淋失/肥料利用率Key words
Irradiation-polymerized water-retaining agent/Soil texture/Nutrient leaching/Fertilizer use efficiency分类
农业科技引用本文复制引用
袁婷,刘颖,刘定辉,郑盛华,周建刚..辐照聚合农林保水剂与肥料配施对不同质地土壤保水保肥能力的影响[J].西南农业学报,2025,38(8):1595-1605,11.基金项目
四川省农业科学院"1+9"揭榜挂帅科技攻关项目(1+9KJGG005) （1+9KJGG005）
成都市重点研发支撑计划目标(2023-YF09-00034-SN) （2023-YF09-00034-SN）
